"Tom Walker" wrote to "Thurston Ackerman" (27 Nov 02  06:31:38)
 --- on the topic of "ram parts"

 -> TW>In fact in my day of repairing Critical Medical Equipment several
 -> TW>manfacturers recommended Pencil Eraser cleaning of card edge
 -> TW>connectors.

 ->  Many of us in GEMS used to finish the cleanup with a light coating
 -> of TV tuner contact cleaner to leave a small deposit of oil in the
 -> small pores of the metal contacts to delay corrosion resulting from
 -> the salt air here on the right coast.

 TW> Actualy for hte medical equipment they recomended leaving the
 TW> Contacts Dry.

Many contact cleaners tend to leave a residue which improves the
conductivity of the metal contact but I've found in some high impedance
circuits that this residue causes current leakages. Not so good for fet
inputs for example and I always cleaned these off with 99% iso...


 TW>  The Chips had a tendenacy to work their way out of the
 TW> sockets anyhow with the Heatup/CoolDown cycles.
 TW> In fact Reseating All chips was part of the Quarterly PM routine.

I noticed some brands of sockets were better with chip creep than
others. Many early cheap XT clones for example always needed the dram
pushed down every few months as their chips kept climbing out of their
sockets relentlessly.

 Mike
 ****

... Compression: What can possibly go worng (
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